Water your plants and lawn in the morning before the sun is to hot, or else the sun will evaporate the water before it can soak into the soil.

DO NOT, however water your lawn at night. This will keep your lawn damp for too long, and will give fungi and mold a chance to take over.

Water your lawn thoroughly, and then stop until the roots have had a chance to dry. This forces the roots do go down further to find water, and makes them stronger and more resilient.

Make a schedule and stick to it. Watering your plants at the same time every day lets them get into a pattern, and makes for healthier plants. In addition, bugs will begin to see the pattern too, and since bugs don't particularly like water, they will more than likely leave your plants for greener pastures.